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    User name X. Zheng

    Log entry time 15:25:15 on November 22, 2009

    Entry number 301850

    This entry is a followup to: 301824

    Followups:

    keyword=Suggestion for delay cable adjustment

    These timing mismatch seem to have been there also for the previous shift, can could have been there since the beginning. It is causing a ~<10% drop in the narrow triggers. Not a big deal but ideally should be corrected.

    Timing adjustment will be small: About 10ns total. If delay cable of this length is available, can do the following:

    Suggest adding 8-12ns to TS cable in group 5, from TS 740 analog sum to DH discriminator. Alternatively can add 4-6ns to this TS cable, and remove 4-6ns from the PS cable, from PS 740 analog sum (which sums PS with tagger) to DM discriminator. During the access on Monday can do whichever is the most convenient.

    A copy of this log entry has been emailed to: rsubedi,dwang,deng,pkpan